This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 30 |
| 2 | 110 |
| 3 | 315 |
| 4 | 771 |
| 5 | 1688 |
| 6 | 3396 |
| 7 | 6390 |
| 8 | 11385 |
| 9 | 19382 |
| 10 | 31746 |
| 11 | 50297 |
| 12 | 77415 |
| 13 | 116160 |
| 14 | 170408 |
| 15 | 245004 |
| 16 | 345933 |
| 17 | 480510 |
| 18 | 657590 |
| 19 | 887799 |
| 20 | 1183787 |
| 21 | 1560504 |
| 22 | 2035500 |
| 23 | 2629250 |
| 24 | 3365505 |
| 25 | 4271670 |
| 26 | 5379210 |
| 27 | 6724085 |
| 28 | 8347215 |